I don't do anything. it does it on its own. I don't know if it is related to cooling or just waiting for capacitors to discharge. I just have to wait for an undetermined period of time, anywhere from a couple of hours to a day.

I have 4 t-con boards. At the time I purchased the first 2 t-con boards, I thought I did my due diligence and tried to stay away potential scammers. I live in Canada so I purchased them all from a site in Canada. I am confident the site I used is reputable. For the last t-con board I purchased they even called me after I placed the order to confirm it would work with my TV so I don't think it is a scam but you never know.

The original t-con that came with the TV and the last t-con board I purchased have the exact same symptoms as the last images I posted with the color bars above...

Thanks for the advice. FYI I have already tried 4 different t-con boards. 2 of them seem to be defective out of the box (even though they were sold as "new" (i.e. from cracked screen)) and the other 2 gave me the exact same results as in the last images posted. I will re-check the tabs for oxidization. Just curious, if it was oxidization, why would the TV work properly for the first hour?...

Hello Everyone,

Sorry I have not updated this thread in a while, I had put aside my troubleshooting due to some personal issues.

To pick up where I left off, where I was getting no video at all just audio, I finally made some progress. To make a long story short, I ended up changing the t-con board again. The one I purchased previously, although it was "new", was over heating the power supply and not displaying any video at all, nor were the backlights turning on. I was only getting audio.

After changing it, I started getting some video, mainly...

Re: 70LE660U dark cloud or black screen with sound.

There are what looks like 5 individual tabs with a chip on it on both the left and right sides of the TV. Then on the bottom edge of the tv, there are 6 ribbon cables, each with a chip on it, connected to the long PCB strip on either side of the t-con. That makes 12 on the bottom of the TV. Please see attached for better explanation....

Re: 70LE660U dark cloud or black screen with sound.

As best as I could measure, some were very tiny, using a digital multimeter, none appeared to be shorted or resulting in low ohms. Most were in the 1.4 to 3 mega ohms range others were on the 200 kilo ohms range. Does that make sense?

Re: 70LE660U dark cloud or black screen with sound.

Thanks for the reply. Yes I tried the putting pressure on the tabs as well as all the other connections, no change. Other than a visual inspection I did not test the capacitors. None of them looked liked there were bubbling.

Hello Everyone,

This is my first post so I will try to be as precise as possible without making this post too long winded. Unfortunately I don't have pictures of the original problem but I included images of the TV internals.

I have a Sharp 70LE660U. The problem started a few months ago with the bottom row looking out of sync and was dark on the left side and then fading to transparent on the right side. Shortly after, a dark cloud appeared in the center of the screen. The dark cloud started small and shaded but the image was visible. It also affected the menu area....

Re: New Members - please post your introductions here

Hello Everyone,

I'm Rosario from Montreal, Can. I started as a PC tech using DOS about 30 years ago and transitioned web dev in the last 5 years. I am a DIYer at heart and work on anything from electronics to home repairs to cars. I am not afraid to try anything but I am no expert in anything, LOL. Looking to learn how to repair my TV and or if i can help, why not!

thanks for listening and regards to all.
Rosario.